Short answer
The Rolex Datejust 126231 is a 36 mm Rolesor watch: Oystersteel case and bracelet with 18 ct Everose gold on the bezel, crown, and bracelet center links. A copy, also sold as a 1:1 replica, copies the outside. It does not carry a solid gold bezel or a Rolex caliber 3235. Rolex lists the 126231 above $13,000 USD. Copies sell from about $200 to $600.
Rolex Datejust 126231 Real vs Fake: A Buyer's Guide
Genuine reference facts
- Reference: 126231, Datejust 36, Rolesor Everose.
- Case: 36 mm, Oystersteel, screw-down crown.
- Bezel: fluted, Everose gold.
- Movement: caliber 3235, automatic, 70-hour power reserve.
- Rate: Superlative Chronometer, -2/+2 seconds per day.
- Water resistance: 100 m / 330 ft.
- Bracelet: Jubilee or Oyster, Everose gold center links.
- Date: 3 o'clock, Cyclops lens at 2.5x.
- Crystal: sapphire.
- Caseback: plain, no engravings.
What a copy matches
Good copies hit these numbers: 36 mm across the case, 20 mm lug width, close to 12 mm thick, dial text in the right spots, date window with a 2.5x cyclops, and a five-link Jubilee look. Movement is the split. Most copies use an ETA 2824 clone or a 2836 clone with a 38 to 40 hour reserve. Some use a Chinese 3135 copy. None use a Chronergy escapement.
Datejust 126231 Replica Rolex Guide: Specs, Flaws, Buying Checks
What a copy cannot match
Gold is the second split. Everose parts on the genuine watch are solid 18 ct, and Swiss law sets the 18 ct mark at 750 parts per 1000. Replica gold parts are plated, most between 3 and 10 microns. Plating wears through on the clasp edge and the crown first. Weight is a rough check only. A genuine 126231 on a full Jubilee bracelet sits near 125 g. Plated copies land close to that, within about 10 g. Weight alone proves nothing.
Checks before you buy
- Measure the case across the middle, not the bezel. Target 36 mm.
- Check the lug width. Genuine is 20 mm.
- Look at the cyclops. The date should fill the window at 2.5x.
- Read the marks. Genuine gold parts carry a 750 fineness mark.
- Inspect solid end links. A gap over 0.5 mm at the lugs is a tell.
- Check the caseback. A plain back is correct. Engravings point to a different case.
- Ask which movement is inside. A 2824 clone and a 3235 are not the same part.
Price notes
Used 126231 prices move with dial color, year, and box and papers. Copy prices track plating thickness and bracelet quality, not resale. No copy holds value. Sellers who claim solid gold or a real 3235 are wrong on both counts.